Transparent, tough and rigid molding compositions based on styrene-butadiene block copolymer mixtures
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United States of America Patent
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Nov 5, 2013
Grant Date -
Dec 2, 2010
app pub date -
Sep 3, 2008
filing date -
Sep 14, 2007
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Abstract
A mixture which contains
- a) a copolymer or block copolymer A comprising one or more copolymer blocks (B/S)A which are respectively composed of from 65 to 95% by weight of vinylaromatic monomers and of from 35 to 5% by weight of dienes, and whose glass transition temperature TgA is in the range from 40° to 90° C.,b) a block copolymer B comprising at least one hard block S which is composed of vinylaromatic monomers, and comprising one or more copolymer blocks (B/S)B which are respectively composed of from 20 to 60% by weight of vinylaromatic monomers and of from 80 to 40% by weight of dienes, and whose glass transition temperature TgB is in the range from −70° to 0° C.,c) a polystyrene C, and its use for the production of packaging for electronics components.
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